[Ken H]

Once again, you are describing a market that is not well regulated. Yes, if the tax is too high, then a black market will arise. That's an obvious point.

I'll say again that a well regulated market deprives a black market of its revenue. Do you agree or disagree?

[VeniVidiVici]

I'll say again that a well regulated market deprives a black market of its revenue. Do you agree or disagree?

Sure. Just like Karl Marx theorized that a "well-regulated" economic system would bring everyone unicorns and rainbows.